沃斯回火球墨鑄鐵機械性質的預測

Prediction the Mechanical Properties of Austempered Ductile Iron

溫東成(Dong-Cherng Wen)

《中華技術學院學報》 20期 (2000/03) Pp. 61-73

https://doi.org/10.7095/JCIT.200003.0061

摘要

本文以定量方式分析回火後ADI組織中各組成相對機械性質的影響並建立可預測機械性質的模式。結果顯示強度與硬度受沃斯回火溫度影響較大，延性與韌性則同時受沃斯回火溫度與沃斯回火時間影響。強度與硬度在高溫ADI由麻田散鐵控制，在低溫ADI則受麻田散鐵與沃斯肥粒鐵控制。延性與韌性在麻田散鐵含量小於20%時由麻田散鐵控制，含量大於20%時則由沃斯肥粒鐵控制。所建立的模式在麻田散鐵含量小於20%時對各機械性質都有準確的預測結果。

關鍵字

沃斯回火球墨鑄鐵 ； 麻田散鐵 ； 沃斯肥粒鐵 ； 機械性質

並列摘要

This paper aims to study the influence of microstructure on mechanical properties of an austempering ductile iron mixtures of tempered martensite and ausferrite. Than a model is proposed to predict the mechanical properties.The results show that strength and hardness were more sensitive to austempering temperature while ductility and toughness were sensitive to both of austempering temperature and austempering time. Strength and hardness were determined by martensite in upper ADI and that were determined by both of martensite and ausferrite in lower ADI. Ductility and toughness were control by martensite when the volume fraction of martensite in ADI was less than 20%, while the martensite content was large than 20% the ductility and toughness were control by ausferrite. The model that proposed in this paper had a good agreement with experimental data in predicting the mechanical properties of ADI for martensite content less than 20%.

並列關鍵字

Austempered ductile iron ； martensite ； ausferrite ； mrechanical properties